You are able to invest money to shares and bonds, as soon as you have brokerage account. You only choose a bank. As opposed to a deposit account, if you wish to sell bond in current price, you won’t lose your percentage and you could buy bonds of one bank and sell the other one.
Nowadays, there are bonds of stated below banks in the circulation...

Pairs trading Is a neutral trade strategy, in which long and short positions open instruments with high degree of correlation, it might be shares, ETF, foreign currencies, commodities, options. The profit of strategy comes from difference between change in price and these two tools, but not from trend, which each of them moves.